Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3bbcf4b5ad06d47…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 05:11:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: aa8ca20d21a537905c449120f4fed433 SHA-1: 927d13472f257d03ea21370a5d37786ba1a1a9d5 SHA-256: f3bbcf4b5ad06d479fa3ef56e7a93c486a832bea915be40762255d0bdc1a224f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/hack-money-vehicle-simulator-roblox-game-hack. The document body and embedded links are designed to lure users with promises of game hacks and free currency, a common social engineering tactic. The ML classifier also strongly indicated maliciousness, suggesting the PDF is designed to exploit vulnerabilities or redirect users to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/hack-money-vehicle-simulator-roblox-game-hack In PDF document text
    • https://www.tena-g.hr/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-work-rc7-hack-roblox_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-spin_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://tena-g.hr/files/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/free-roblox-exploits-august-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8F 21920 bytes
SHA-256: 049fcbd95cf775810d2599c40e0e5d1782731624e0b072887df8fe8bb18315cd
font_01_sfnt_off00005ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDF 19956 bytes
SHA-256: ce6c523c76b786dbcd6d06fdc06ebaffbb0ba64a59f4dcdf5ef5930648ba874c

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